Question: Who is the master of Leonardo da Vinci, who was employed as a sculptor?
Paraphrase: Who is the ace of Leonardo da Vinci, who was utilized as a sculptor?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q762 wdt:P1066 ?answer . ?answer wdt:P106 wd:Q1281618}
Answer: Andrea del Verrocchio